20188324859 has 4 divisors (see below), whose sum is σ = 20188626360. Its totient is φ = 20188023360.

The previous prime is 20188324853. The next prime is 20188324901. The reversal of 20188324859 is 95842388102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20188324859 is a prime.

It is a super-2 number, since 2×20188324859² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20188324853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182 + ... + 200939.

It is an arithmetic number, because the mean of its divisors is an integer number (5047156590).

Almost surely, 2^20188324859 is an apocalyptic number.

20188324859 is a deficient number, since it is larger than the sum of its proper divisors (301501).

20188324859 is a wasteful number, since it uses less digits than its factorization.

20188324859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301500.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 20188324859 in words is "twenty billion, one hundred eighty-eight million, three hundred twenty-four thousand, eight hundred fifty-nine".